/***********************************************************************
 
 Copyright (c) 2008, 2009, 2010 Memo Akten, www.memo.tv
 *** The Mega Super Awesome Visuals Company ***
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of MSA Visuals nor the names of its contributors 
 *       may be used to endorse or promote products derived from this software
 *       without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE. 
 *
 * ***********************************************************************/ 

#pragma once
#include "ofxiOSConstants.h"
#if defined(OF_UI_KIT) && defined(OF_GL_KIT)
#import <UIKit/UIKit.h>
#import "ESRenderer.h"

@protocol EAGLViewDelegate <NSObject>
@optional
- (void)glViewAnimationStarted;
- (void)glViewAnimationStopped;
- (void)glViewDraw;
- (void)glViewResized;
@end

// This class wraps the CAEAGLLayer from CoreAnimation into a convenient UIView subclass.
// The view content is basically an EAGL surface you render your OpenGL scene into.
// Note that setting the view non-opaque will only work if the EAGL surface has an alpha channel.
@interface EAGLView : UIView
{
@protected
    id <ESRenderer> renderer;
    CGFloat scaleFactor;
    CGFloat scaleFactorPref;
    
    BOOL bUseDepth;
    BOOL bUseMSAA;
    BOOL bUseRetina;
    NSInteger msaaSamples;
    ESRendererVersion rendererVersion;
    
  BOOL animating;
  BOOL displayLinkSupported;
  float animationFrameInterval;
  // Use of the CADisplayLink class is the preferred method for controlling your animation timing.
  // CADisplayLink will link to the main display and fire every vsync when added to a given run-loop.
  // The NSTimer class is used only as fallback when running on a pre 3.1 device where CADisplayLink
  // isn't available.
  id displayLink;
    NSTimer * animationTimer;
    
    NSLock * glLock;
}

@property (nonatomic, weak) id<EAGLViewDelegate> delegate;
@property (readonly, nonatomic, getter=isAnimating) BOOL animating;
@property (nonatomic, assign) float animationFrameInterval;
@property (nonatomic, assign) float animationFrameRate;

- (instancetype)initWithFrame:(CGRect)frame
          andPreferedRenderer:(ESRendererVersion)rendererVersion
                     andDepth:(bool)depth
                        andAA:(bool)msaaEnabled
                andNumSamples:(int)samples
                    andRetina:(bool)retinaEnabled
               andRetinaScale:(CGFloat)retinaScale
                   sharegroup:(EAGLSharegroup*)sharegroup;

- (void)startAnimation;
- (void)stopAnimation;
- (void)drawView;

- (void)lockGL;
- (void)unlockGL;

- (void)startRender;
- (void)finishRender;

- (void)destroy;

- (EAGLContext *)context;

- (GLint)getWidth;
- (GLint)getHeight;

- (void)notifyAnimationStarted;
- (void)notifyAnimationStopped;
- (void)notifyDraw;
- (void)notifyResized;

- (ESRendererVersion) getESVersion;

@end

#endif
